Apple MacBook Pro (15-inch, Late 2008) - Manual (Page 38)

38 Chapter 3 Boost Your MacBook Pro
Replacing the Hard Disk Drive
You can upgrade the hard disk drive in your MacBook Pro. The hard disk drive is
located to the left of the battery when you open the back of your MacBook Pro.
The replacement drive must be a 2.5-inch drive with a Serial ATA (SATA) connector.
To replace the hard disk drive in your MacBook Pro:
1 Follow the instructions for removing the battery on page 34.
2 Touch a metal surface inside the computer to discharge any static electricity from
your body.